Exhaust ventilator



April 27 1926. 1,582,592 E. L. FORD 4 EXHAUST VENTILATOR Original Filed 25, 1924 Patented Apr. 2?, 1926,

ills! assassin earns e ERNEST LEONARD scan, or nAnLrNe'ron, ENGLAND.

EXHAUST VENTILA'IOR.

Original application filed October '25, 19%,

Serial No. 745,915. Divided and this application filed May 9,

1925. Serial No. 29,341.

new and useful Improvements in Exhaust Ventilators, of which the following is a specification.

This invention relates to automatic exhaust ventilators for the closed compartments or bodies of vehicles, and it has tor its object a construction which is highly ethcient at all speeds at which the vehicle may be moving, which has no moving or loose parts liable to get out of order or lost, and which has a presentable appearance.

This case is a division of the copending case Serial Number 745,915, filed October 25, 192%, and which has matured into Patent, Number 1,568,373, dated January 5, 1926.

I attain these ends by the construction shown in the accompanying drawing in which Figures 1, 2 and 3 are views in side elevation, end elevation and plan, and Figure 4 is a View in longitudinal section on line 10 to Figure 3. r

Throughout the views similar parts are marked with like numerals of reference.

The hollow body 1 which forms the. ex-

' haust chamber is of lozenge or rhomb shape and has both its sides 2 and its top 0 of convex form. In each of the sides 2 are two apertures4 and 5 the apertures 4- being approximate to one end of the body andthose 5 being approximate to theother end thereof. These apertures are of approximately V-shape with their apices towards the ends of the body. On each side of the body are two exterior plates forming deflectors 6 and '2' which are preferably inclined or curved so as to coincide or register with the edges of the apertures nearest to the ends of the body. At the tops of the deflectors 6 and 7 are horizontally or ap proximately horizontally disposed plates 15 which extend towards the centre of the body and preferably taper towards said point. These plates 15 may be provided with apertures 16 which operate to intensity the negative pressure atthe apertures t or 5 by reasons of the flow of air over said openings. The central part of the base is formed by two inclined plates 11 which slope upwardly towards one another and tormby and between them a relatively narrow centrally arranged transverse aperture 12. The edges of the aperture 12 are preferably shaped to form upwardly curved lips 13. On each of the plates 11 is a series or vertically arranged plates 17 which extend between the base and the top or root 3. These plates 1''? are angularly arranged so that their ends nearest to the ends of the body are inclined towards the longitudinal centre of said body and they are so located relative to each pair of apertures 4t, 1 and 5, 5 that they partly register with said apertures.

The act-ion of the ventilator is as follow Directly the vehicle is in motion and so long as it continues to move at a slow speed a current of air strikes the front pair or dedoctors-say 6 and 6and is deflected by them over the front pair of apertures 4 and 4 thus setting up a negative pressure or partial vacuum at said apertures. This negative pressure creates a similar negative pressure in the interior of the body 1 which causes a suction action at the central aperture 12 in its base thereby extracting the air out of the body of the. vehicle 12 through thehole in the'root' with which said aperture registers. The current of air after passing the tront pair or deflectors (l and ti low speeds by reason of the restricted area of the chamber at its central aperture by reason of the upward slope of the inclined plates 11, the upturned lips 13 ot the in olined plates 11 at the edges of the central aperture and the arrangement of the plates 17. When higher speeds are attained the area ofnegative pressure set up by the front pair of deflectors is considerably increased and extends completely around the outside off the body so that a negative pressure is also set up at the rear apertures as Well as int) at the front ones whereby a negative pressure or partial vacuum is produced at both ends of the interior of the body. llhen a side or three-quarter wind is blowing, the exterior deflectors facing the wind eoact. with the interior deflector plates to set up the necessary ejector action.

lVhat I claim is 1. An exhaust ventilator comprising a. chamber which consists of a base having a transversely arranged opening at the centre of its length, a top and a. pair of converging side walls having openings located in opposed pairs nearthe ends ot the chamber; plates forming exterior del'lcctors on the side walls of said chamber adjacent to said side openings; and a plurality ot vertically arranged deflector plates located within said chamber on each side of the transverse aperture in the base.

An exhaust; ventilator comprising a chamber consisting ot a base having a centrally located transverse opening, a top, and sides connecting said top and said base which converge towards each other and in which are angularly-sha-ped apertures which are located in opposed pairs near the ends o t the chamber; inclined plates on the side walls ot said body "forming exterior deflectors which register with the upper edges of said angularly-shaped apertures; and a plurality of vertically arranged deflector plates in interior of the chamber on either side of the transverse aperture in the base.

3. In combination in an exhaust ventilator a lozenge chamber comprising a base which slopes upwardly towards the centre and has a centrally located transverse opening, a top, and side walls extending between said base and said top and having angularly-shaped apertures which are located in opposed pairs near the ends of the chamber; inclined plates :t'orming-exterior deflectors on the side walls of said chamber which register with the edges of said apertures nearest:- to the ends of the chamber; and a plurality of angularly arranged vertical plates located in proxin'iity to the two edges of the central aperture in the base of the chamber which operate as interior deflectors.

l. In combination in an exhaust ventilator, a lozenge chamber comprising a base which slopes upwards towards the centre of its length andkhas a transverse opening at such mid position, a top, and side walls which converge towards the ends of the apparatus and have angularly-shaped apertures which are located in opposed pairs near the ends of said chamber each with its apex towards the adjacent end of the apparatus; inclined plates forming exterior deflectors on the side alls of said chamber which register with the edges of said apertures nearest to the ends of the apparatus; horizontally disposed apertured extensions of the exterior dellectors, and a plurality o'l angnlarly arranged vertical plates located in proximity to the two edges of the aperture in the base of the ch amber.

5. A double-ended symmetrical exhaust ventilator comprising a base sloping upwards towards the centre of its length and having a transversely arranged opening at its centre, a top above said base, a pair of forwardly converging side walls and a pair of rearward converging side walls between id base and said top and having an opening in each ol said side walls, a pair ol' l'orwardly and a pair ol rearwardly inclined plates on the exterior of the side walls adjacentot' said openings in said side walls, and a plurality ot vertical angularly arranged plates extending between the base and the top on each side of the transverse opening in said base.

(3. It double-ended symmetrical exhaust ventilator comprising a base sloping upwards towards the centre o'l its length and having a relatively narrow transversely arranged opening at said centre. a top above said base, a pair of forwardly converging side walls and a pair of rearward conver 1 ing side walls between said base and said top and having angular openings the edges of which nearest to the ends of the ventilator slope upwards and backwards from the base to the top, a pair of forwardly anda pair of rearwardly inclined plates on the exterior of the side walls which register with the sloping edges of the openings in said side walls, and a plurality of detlector plates in the interior of the ventilator on each side of the central opening in the base and extending vertically :lrom the base to the top.

7. A double-ended symmetrical exhaust ventilator comprising a base which slopes upwards towards the centre of its length and has a -relatively narrow transversely arranged opening at said centre, a top above said base, a pair of torwardly converging side walls and a .pair of rearward converging side walls between said base and said top and having angular openings the edges of which nearest to the ends of the ventilator slope upwards and back 'ards t'rom the base to the top, a pair-oi forwardly and a pair oi rcarwardly inclined plates on the exterior of the side walls which register with the sloping edges of the openings in. said side walls, horizontally disposed apertured extensions ol said inclined plates at their up per ends, and a plurality of angularly arranged vertical plates extending from the base to the top and located on each side of the transverse opening in the base.

ERNEST LEONARD FORD. 

